<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>平移动画</title>
    <style>
        .box {
            width: 200px;
            height: 100px;
            background-color: skyblue;
            animation: move 5s linear infinite;
        }
        /* 自定义动画 */
        @keyframes move {
            0% {
                transform: translate(0);
            }
            25% {
                transform: translateX(500px);
            }
            50% {
                transform: translateX(500px) translateY(500px);
            }
            75% {
                transform: translateX(0) translateY(500px);
            }
            100% {
                transform: translate(0);
            }
        }
    </style>
</head>
<body>
    <div class="box"></div>
</body>
</html>